How to Calculate Impact Force F

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The force F is the force “pull” or “push” on an object to move it or make it move faster. Newton’s second law of motion describes the relationship between force, mass, and acceleration, and this relationship is applied to force calculations. The greater the mass of an object, the greater the force required to make it move.

Table of Contents

Steps

Memorize the Recipe

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Multiply the mass of the object by the acceleration. A force (F) required to move an object of mass (m) with an acceleration (a) is calculated by the formula F= mx a. Or force = mass times acceleration. ^[1]

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Convert units to SI. SI stands for International System of Units, the SI unit of mass is kilogram and of acceleration is m/s ² (Meters per second squared). Since mass and acceleration have SI units, the unit of force must also follow this system to be N (Newton).

• For example, if the mass of the object is 3 pounds, you need to convert it to kilograms. 3 pounds equals 1.36 kg, so we have a mass of 1.36 kg. ^[2]

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Remember that in physics, mass and weight are two completely different concepts. If given in the mass of the object (unit N), divide that value by 9.8 to get the corresponding mass value. For example, an object with a weight of 10 N would have a mass of 10/9.8 = 1.02 kg.

Applying formula

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Find the force sufficient to move a car weighing 1000 kg with an acceleration of 5 m/s ² .

• Check whether the units are in accordance with the standard of the SI system or not
• Multiply the mass value (1000 kg) by 5 m/s ² to find the force value

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Calculate the value of force enough to move the 8-pound chariot with an acceleration of 7 m/s ² .

• First, convert all units to SI. 1 pound is equal to 0.453 kg, multiply this value by 8 pounds to determine the mass.
• Multiply the new mass value (3.62 kg) by the acceleration (7 m/s ² ).

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Find the magnitude of the force acting on a cart of mass 100 N with an acceleration of 2.5 m/s ² .

• Remember: 9.8 N equals 1 kg. So, convert Newtons to kilograms by dividing by 9.8, and you get 10.2 kilograms.
• Multiply the new mass value (10.2 kg) by the acceleration (2.5 m/s ² ).

Advice

• Always read the question carefully to see if the question is for weight or volume.
• Another way of writing Newton’s unit, the standard unit of force, is N = kg * m/s^2.
• Check to make sure that all values are converted to kilograms and m/s^2.

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The force F is the force “pull” or “push” on an object to move it or make it move faster. Newton’s second law of motion describes the relationship between force, mass, and acceleration, and this relationship is applied to force calculations. The greater the mass of an object, the greater the force required to make it move.

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